PLATE XL. 



Enallaster obliqxjatus Clark (p. 87). 



U. S. Nat. Mus. 12237, type. 

 Figure la. Upper surface of the test, 

 lb . Lower surface of the test, 

 lc. Lateral view of the test. 

 Id. Posterior view of the test. 



le. Portion of the petaloidal region of the anterior ambulacrum. X 8. 

 If. Same, left anterior ambulacrum, X 8. 

 lg. Second plate of the same from the mouth opening, X 8. 

 lh. Diagram showing arrangement of plates about the mouth opening, X 3 

 li. Apical system, X ?. 

 Ik. Tubercle from above, X 10. 

 11. Lateral view of the same, X 10. 



